Abstract. The dynamics of the main electrophysiological indicators of the functional state of the visual system at rest and under extreme short-term loading is presented in the article. The voluntary external breath-holding test (VEBH) of maximum duration was applied to make a model of hypoxia. It has been established that the dynamics of change of the b-wave amplitude and late components indicators of the evoked potentials in athletes under short-term hypoxemic stress testifies to activation of urgent protective and compensatory mechanisms expressed in the development of inhibition processes in peripheral and central parts of the visual analyzer.
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